pound the table
rest one's case
mog
assert oneself
opinionize
objectivate
objectivize
swear blind
dig in one's heels
asseverate
gladiator
roast
take up for
mean
plant one's feet
berate
insist
expostulate
speak up
assert
give someone a piece of one's mind
vindicate
bagsy
counterassert
hold
have words
stand up for
put one's money where one's mouth is
take a stand
breed in the bone
swear
say the quiet part loud
contest
hold to
misnegotiate
objurgate
fend and prove
thirst
polemicize
bully
allow
profess
get up in someone's face
shoot one's mouth off
deign
elocute
stand in the gap
spit fire
harangue
go to bat